PHP $_SERVER['REMOTE_ADDR'] empty

Question

Somehow $_SERVER[\'REMOTE_ADDR\'] returns an empty string, i have the same code (as part of a script) running on multiple servers and it works everywhere else,

Answer 1

if you're behind a proxy server, you can use $_SERVER['HTTP_X_FORWARDED_FOR'] or $_SERVER['HTTP_CLIENT_IP'] instead of $_SERVER['REMOTE_ADDR']. this will depends on how your proxy is configured.